Apple Macintosh PowerBook 150 - Manual (Page 123)

Application programs
A program won’t open.
m Some programs can’t be opened from a locked floppy disk. Make sure the
disk is unlocked. (Unlock a disk by sliding the tab so that it covers the hole
at the corner of the disk.)
m The program may be damaged. Recopy it from a known good source (such
as the original program disk).
m There may not be enough memory available to open the program. Quit
other programs or change this program’s memory size in the Info window.
A program runs very slowly.
m Some programs are slowed by processor cycling. You can turn processor
cycling off; see Chapter 6.
A message says that a program could not be found.
m You may be trying to open a document created with a program you don’t
have on your computer, or created with a different version of the program.
Obtain the correct program and version. Or, open the document with
another program that can read its format. (If another program can open a
document, the program icon becomes highlighted when you drag the
document icon on top of it.)
A program doesn’t work, or it produces errors consistently.
m You may have more than one copy of the program on your hard disk.
Remove extra copies by dragging them to the Trash.
m The program may be damaged. Recopy it from a known good source (such
as the original program disk).
m Your version of the program may be incompatible with your system
software. Consult the software manufacturer to find out which version of
the program you should be using.
m The program may be using less memory than it needs to work with
your documents. Choose Get Info from the File menu and increase the
memory size.
115 Tips and Troubleshooting